The Viper Fang 20-105 automatic floor scrubber has a 20" pad-assist scrubber with pad driver. 50 pounds of pad pressure allow you sufficient down force to really give your floors a good cleaning. The two 12 volt 105 amp batteries come with a convenient 12 amp auto charger, giving you about 3.5 hours of run time at 21,000 square feet per hour. Simple, easy to use controls and a "platform" design make this autoscrubber a breeze to use. You'll get years of use from the tough, rotationally molded housing.